defensive publication

ABSTRACT

PROCESS FOR PREPARING TRIMETHYLHYDROQUINONE BY CONTACTING 2,6,6-TRIMETHYLCYCLOHEX-2-ENE-1,4-DIONE WITH AN ACYLATING AGENT IN THE PRESENCE OF AN ACID CATALYST. TRIMETHYLHYDROQUINONE DIESTER IS FORMED FIRST, WHICH MAY BE HYDROLYZED BY TREATMENT WITH AQUEOUS ACID OR BASE. WHEN THE HYDROLYSIS MIXUTRE COOLS, TRIMETHYLHYDROQUINONE MAY BE SEPARATED THEREFROM.

UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.6. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public-tor inspection and reproduction may he purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter;

PUBLISHED JULY 25, 1972 T900,015 PROCESS FOR PREPARING TRIMETHYL- HYDROQUINONE John G. Thwcatt, Rte. 11 37462, and Fred H. Rash, 510 Whispering Way 37663, both of Kingsport, Tenn. Filed Oct. 1, 1970, Ser. No. 77,377 Int. Cl. C07c 39/08, 69/16 US. Cl. 260--621 R No Drawing. 9 Pages Specification Process for preparing trimethylhydroquinone by contacting 2,6,G-trimethylcyclohex-2-ene-1,4-dione with an acylating agent in the presence of an acid catalyst. Trimethylhydroquinone diester is formed first, which may be hydrolyzed by treatment with aqueous acid or base. When the hydrolysis mixture cools, trimethylhydroquinone may be separated therefrom. 

